Mark, Luke and John are agreed in mentioning a single animal, a donkey colt. It was loosed, brought to Jesus, garments placed upon it, and then Jesus rode on it. Matthew insists on telling us that there were really two animals, the colt and its mother. The AV (KJV) has a most unfortunate translation of both Matthew 21:5 and Zechariah 9:9 (that has been corrected in the NKJV, fortunately). In Zechariah the AV has, “riding upon an ass, and upon a colt the foal of an ass.” In Matthew the AV has, “sitting upon an ass, and a colt the foal of an ass.” The obvious difficulty is that the AV makes Jesus ride two animals, when in fact He only rode one. For the correct rendering of both Zechariah and Matthew, at this point, please see the NKJV. That said, however, the fact remains that Matthew clearly has the disciples fetching two animals and placing garments on both.

Why do you suppose the Holy Spirit had Matthew supply the added information? I was not there, of course, but I offer my understanding of the event. Mark and Luke specify that no one had ever sat on the colt; they say that the colt was tied, but Matthew says it was really the mother that was tied. Evidently the colt was so young that it was still staying close to ‘mother’, so if she was tied, he was too, in effect (they were out in the street, and that may have been a new experience for the colt). Jesus was going to subject the colt to a strange and even frightening situation. From the peace and quiet of his little village, he would be surrounded by a shouting crowd. Strange things would be put on his back, and then someone who was probably bigger and heavier than he was would sit on him! I believe that Jesus had the mother brought along as moral support for her son. Clothes were put on her too (and of course she was surrounded by the shouting crowd as well), and seeing that she was calm would encourage the colt. Just by the way, Jesus probably had to lift His feet to keep them from dragging; it must have been a comical sight. It gives me a warm feeling to see that the Lord Jesus was concerned for the well-being of the colt.